In-facepiece dust concentration is changed dozens of times in a matter of minutes due to changes of the size of the gaps between the mask and face. Source. A respirator is a device designed to protect the wearer from inhaling particulate matter, including airborne microrganisms, fumes, vapors, i.e. gases.
Why join Brainly? A community for students. Products of the neolithic culture Steel plows Boats with sails Domesticated dogs Wild figs. the answer would mostly likely be referring to things that actually were of use to the neolithic people and agriculture was the biggest thing making the answer steel plow. anonymous.
View Slideshow View Thumbnails. The Neolithic period, which began in China around 10,000 B.C. and concluded with the introduction of metallurgy about 8,000 years later, was characterized by the development of settled communities that relied primarily on farming and domesticated animals rather than hunting and gathering.iew Slideshow View Thumbnails. The Neolithic period, which began in China around 10,000 B.C. and concluded with the introduction of metallurgy about 8,000 years later, was characterized by the development of settled communities that relied primarily on farming and domesticated animals rather than hunting and gathering.